One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,5,8)(3,9,11,16)(4,12,14,7)(6,13,15,10)(17,18,23,29)(19,30,34,41)(20,35,38,45)(21,25,22,27)(24,40,43,32)(26,37,28,36)(31,44,48,42)(33,47,39,46)(17,19,23,34)(18,24,29,43)(20,31,38,48)(21,33,22,39)(25,44,27,42)(26,46,28,47)(30,45,41,35)(32,37,40,36)(1,3,5,11)(2,6,8,15)(4,13,14,10)(7,16,12,9)(18,25)(19,31)(20,36)(21,22)(24,41)(26,28)(27,29)(30,43)(32,33)(34,48)(37,38)(39,40)(42,46)(44,47)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.